| Step | Hyp | Ref
| Expression |
| 1 | | orc 400 |
. . 3
                 |
| 2 | 1 | a1i 11 |
. 2
                   |
| 3 | | olc 399 |
. . 3
                 |
| 4 | 3 | a1i 11 |
. 2
                   |
| 5 | | funcres2c.a |
. . . . 5
     |
| 6 | | eqid 2622 |
. . . . 5
       |
| 7 | | eqid 2622 |
. . . . . . 7
         |
| 8 | | eqid 2622 |
. . . . . . 7
 f    f    |
| 9 | | funcres2c.d |
. . . . . . 7
   |
| 10 | | inss2 3834 |
. . . . . . . 8
           |
| 11 | 10 | a1i 11 |
. . . . . . 7
             |
| 12 | 7, 8, 9, 11 | fullsubc 16510 |
. . . . . 6
   f
                 Subcat    |
| 13 | 12 | adantr 481 |
. . . . 5
 
             f                  Subcat    |
| 14 | 8, 7 | homffn 16353 |
. . . . . . 7
 f              |
| 15 | | xpss12 5225 |
. . . . . . . 8
           
                                     |
| 16 | 10, 10, 15 | mp2an 708 |
. . . . . . 7
             
           |
| 17 | | fnssres 6004 |
. . . . . . 7
  
f                                        f                                  |
| 18 | 14, 16, 17 | mp2an 708 |
. . . . . 6
  f                                 |
| 19 | 18 | a1i 11 |
. . . . 5
 
             f                                  |
| 20 | | funcres2c.1 |
. . . . . . . 8
       |
| 21 | 20 | adantr 481 |
. . . . . . 7
 
                 |
| 22 | | ffn 6045 |
. . . . . . 7
    
  |
| 23 | 21, 22 | syl 17 |
. . . . . 6
 
             |
| 24 | | frn 6053 |
. . . . . . . 8
    
  |
| 25 | 21, 24 | syl 17 |
. . . . . . 7
 
          
  |
| 26 | | simpr 477 |
. . . . . . . . . 10
 
    
      |
| 27 | 5, 7, 26 | funcf1 16526 |
. . . . . . . . 9
 
    
          |
| 28 | | frn 6053 |
. . . . . . . . 9
               |
| 29 | 27, 28 | syl 17 |
. . . . . . . 8
 
    
      |
| 30 | | eqid 2622 |
. . . . . . . . . . 11
         |
| 31 | | simpr 477 |
. . . . . . . . . . 11
 
    
      |
| 32 | 5, 30, 31 | funcf1 16526 |
. . . . . . . . . 10
 
    
          |
| 33 | | frn 6053 |
. . . . . . . . . 10
               |
| 34 | 32, 33 | syl 17 |
. . . . . . . . 9
 
    
      |
| 35 | | funcres2c.e |
. . . . . . . . . 10

↾s   |
| 36 | 35, 7 | ressbasss 15932 |
. . . . . . . . 9
         |
| 37 | 34, 36 | syl6ss 3615 |
. . . . . . . 8
 
    
      |
| 38 | 29, 37 | jaodan 826 |
. . . . . . 7
 
          
      |
| 39 | 25, 38 | ssind 3837 |
. . . . . 6
 
          
        |
| 40 | | df-f 5892 |
. . . . . 6
          

         |
| 41 | 23, 39, 40 | sylanbrc 698 |
. . . . 5
 
               
       |
| 42 | | eqid 2622 |
. . . . . . . . 9
       |
| 43 | | simpr 477 |
. . . . . . . . 9
   
 
    
      |
| 44 | | simplrl 800 |
. . . . . . . . 9
   
 
    
  |
| 45 | | simplrr 801 |
. . . . . . . . 9
   
 
    
  |
| 46 | 5, 6, 42, 43, 44, 45 | funcf2 16528 |
. . . . . . . 8
   
 
    
                                |
| 47 | | eqid 2622 |
. . . . . . . . . 10
       |
| 48 | | simpr 477 |
. . . . . . . . . 10
   
 
    
      |
| 49 | | simplrl 800 |
. . . . . . . . . 10
   
 
    
  |
| 50 | | simplrr 801 |
. . . . . . . . . 10
   
 
    
  |
| 51 | 5, 6, 47, 48, 49, 50 | funcf2 16528 |
. . . . . . . . 9
   
 
    
                                |
| 52 | | funcres2c.r |
. . . . . . . . . . . . 13
   |
| 53 | 35, 42 | resshom 16078 |
. . . . . . . . . . . . 13
         |
| 54 | 52, 53 | syl 17 |
. . . . . . . . . . . 12
         |
| 55 | 54 | ad2antrr 762 |
. . . . . . . . . . 11
   
 
    
        |
| 56 | 55 | oveqd 6667 |
. . . . . . . . . 10
   
 
    
      
                         |
| 57 | 56 | feq3d 6032 |
. . . . . . . . 9
   
 
    
                              
                                 |
| 58 | 51, 57 | mpbird 247 |
. . . . . . . 8
   
 
    
                                |
| 59 | 46, 58 | jaodan 826 |
. . . . . . 7
   
 
                                           |
| 60 | 59 | an32s 846 |
. . . . . 6
                                                 |
| 61 | 41 | adantr 481 |
. . . . . . . . . 10
                             |
| 62 | | simprl 794 |
. . . . . . . . . 10
                
  |
| 63 | 61, 62 | ffvelrnd 6360 |
. . . . . . . . 9
                             |
| 64 | | simprr 796 |
. . . . . . . . . 10
                   |
| 65 | 61, 64 | ffvelrnd 6360 |
. . . . . . . . 9
                             |
| 66 | 63, 65 | ovresd 6801 |
. . . . . . . 8
                         f                              
f           |
| 67 | 10, 63 | sseldi 3601 |
. . . . . . . . 9
                           |
| 68 | 10, 65 | sseldi 3601 |
. . . . . . . . 9
                           |
| 69 | 8, 7, 42, 67, 68 | homfval 16352 |
. . . . . . . 8
                        f                          |
| 70 | 66, 69 | eqtrd 2656 |
. . . . . . 7
                         f                                         |
| 71 | 70 | feq3d 6032 |
. . . . . 6
                                         f                                                         |
| 72 | 60, 71 | mpbird 247 |
. . . . 5
                                        f                          |
| 73 | 5, 6, 13, 19, 41, 72 | funcres2b 16557 |
. . . 4
 
             
     cat   f
                       |
| 74 | | eqidd 2623 |
. . . . . 6
 
            f
   f
    |
| 75 | | eqidd 2623 |
. . . . . 6
 
           compf  compf    |
| 76 | 7 | ressinbas 15936 |
. . . . . . . . . . 11
  ↾s   ↾s          |
| 77 | 52, 76 | syl 17 |
. . . . . . . . . 10
 
↾s   ↾s          |
| 78 | 35, 77 | syl5eq 2668 |
. . . . . . . . 9
  ↾s          |
| 79 | 78 | fveq2d 6195 |
. . . . . . . 8
 
f   
f   ↾s           |
| 80 | | eqid 2622 |
. . . . . . . . . 10
 ↾s         ↾s         |
| 81 | | eqid 2622 |
. . . . . . . . . 10
 cat   f
                   cat   f
                   |
| 82 | 7, 8, 9, 11, 80, 81 | fullresc 16511 |
. . . . . . . . 9
   f
  ↾s          f  
cat   f
                   compf  ↾s 
       compf 
cat   f
                      |
| 83 | 82 | simpld 475 |
. . . . . . . 8
 
f   ↾s          f
  cat   f
                     |
| 84 | 79, 83 | eqtrd 2656 |
. . . . . . 7
 
f   
f   cat  
f                      |
| 85 | 84 | adantr 481 |
. . . . . 6
 
            f
   f
  cat   f
                     |
| 86 | 78 | fveq2d 6195 |
. . . . . . . 8
 compf  compf 
↾s           |
| 87 | 82 | simprd 479 |
. . . . . . . 8
 compf 
↾s         compf  cat
  f                      |
| 88 | 86, 87 | eqtrd 2656 |
. . . . . . 7
 compf  compf 
cat   f
                     |
| 89 | 88 | adantr 481 |
. . . . . 6
 
           compf  compf 
cat   f
                     |
| 90 | | df-br 4654 |
. . . . . . . . . . 11
    
       |
| 91 | | funcrcl 16523 |
. . . . . . . . . . 11
  
  
    |
| 92 | 90, 91 | sylbi 207 |
. . . . . . . . . 10
     
   |
| 93 | 92 | simpld 475 |
. . . . . . . . 9
       |
| 94 | | df-br 4654 |
. . . . . . . . . . 11
    
       |
| 95 | | funcrcl 16523 |
. . . . . . . . . . 11
  
  
    |
| 96 | 94, 95 | sylbi 207 |
. . . . . . . . . 10
     
   |
| 97 | 96 | simpld 475 |
. . . . . . . . 9
       |
| 98 | 93, 97 | jaoi 394 |
. . . . . . . 8
          
  |
| 99 | | elex 3212 |
. . . . . . . 8
   |
| 100 | 98, 99 | syl 17 |
. . . . . . 7
          
  |
| 101 | 100 | adantl 482 |
. . . . . 6
 
             |
| 102 | | ovex 6678 |
. . . . . . . 8
 ↾s   |
| 103 | 35, 102 | eqeltri 2697 |
. . . . . . 7
 |
| 104 | 103 | a1i 11 |
. . . . . 6
 
             |
| 105 | | ovex 6678 |
. . . . . . 7
 cat   f
                   |
| 106 | 105 | a1i 11 |
. . . . . 6
 
            cat  
f                     |
| 107 | 74, 75, 85, 89, 101, 101, 104, 106 | funcpropd 16560 |
. . . . 5
 
               cat  
f                      |
| 108 | 107 | breqd 4664 |
. . . 4
 
             
     cat   f
                       |
| 109 | 73, 108 | bitr4d 271 |
. . 3
 
             
         |
| 110 | 109 | ex 450 |
. 2
    
 
    
    
        |
| 111 | 2, 4, 110 | pm5.21ndd 369 |
1
     
       |